Effects of Technological Parameters on Basic Properties of Copper Based Composite Material with Large Particles of Graphite

Adding supersized graphite particles to improve the lubrication performance of copper has the advantages of simple preparation and low process cost. Based on the development of copper based composites with supergranular-sized graphite particles, the effects of process parameters on the basic properties of the composites such as thermal conductivity, compression strength and friction coefficient were investigated. It was found that the thermal conductivity of the compound was obviously higher than that of the compound with the same quality and smaller size graphite raw material. The higher the graphite content and the smaller the particle size, the lower the thermal conductivity of the copper/graphite composites. The results showed that the required non-proportional compressive strength and compressive strength of the composite were significantly greater than those of graphite feedstock with smaller particle sizes. Within the granularity range (120 to 1500 μm) and content range (5 wt%~15 wt%) of this work, the larger the size of graphite particles, the smaller the graphite content, the better the mechanical strength of the composite. The results also show that the friction coefficient of the composite is basically the same as that of the composite with the same quality and smaller size graphite raw material. When the graphite content in this work is 10%wt with a particle size of 32 mesh (about 720 μm), the friction properties are better.